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Patent US2874397A successfully refreshed from Google Patents.
US2874397A
Expired / Lapsed
US
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Floor washing machines
Assignee: Individual
•
Filing: 1953-09-16
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Granted: 1959-02-24
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Expires: 1973-09-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Hirak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:23
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4088; A47L11/29; A47L11/294; A47L11/4002; A47L11/4005; A47L11/4013; A47L11/4016; A47L11/4036; A47L11/4044; A47L11/4047; A47L11/4052; A47L11/4058; A47L11/4061; A47L11/4063; A47L11/4069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US619348A
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US969032A
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US1149835A
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US1379806A
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US1522133A
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US1969674A
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US2043878A
Cited
GB609981A
Cited
GB623856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |